/*
 * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
 * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
 */

package org.jetbrains.kotlin.fir.analysis.checkers.expression

import org.jetbrains.kotlin.config.LanguageFeature
import org.jetbrains.kotlin.descriptors.Modality
import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
import org.jetbrains.kotlin.diagnostics.reportOn
import org.jetbrains.kotlin.fir.SessionHolder
import org.jetbrains.kotlin.fir.analysis.checkers.MppCheckerKind
import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors
import org.jetbrains.kotlin.fir.declarations.utils.modality
import org.jetbrains.kotlin.fir.expressions.FirQualifiedAccessExpression
import org.jetbrains.kotlin.fir.isEnabled
import org.jetbrains.kotlin.fir.isJavaNonAbstractSealed
import org.jetbrains.kotlin.fir.references.toResolvedConstructorSymbol
import org.jetbrains.kotlin.fir.resolve.fullyExpandedType
import org.jetbrains.kotlin.fir.resolve.toRegularClassSymbol
import org.jetbrains.kotlin.fir.symbols.SymbolInternals
import org.jetbrains.kotlin.fir.symbols.impl.FirRegularClassSymbol
import org.jetbrains.kotlin.fir.types.classLikeLookupTagIfAny

object FirSealedClassConstructorCallChecker : FirQualifiedAccessExpressionChecker(MppCheckerKind.Common) {
    context(context: CheckerContext, reporter: DiagnosticReporter)
    override fun check(expression: FirQualifiedAccessExpression) {
        val constructorSymbol = expression.calleeReference.toResolvedConstructorSymbol(discardErrorReference = true) ?: return

        val typeSymbol = constructorSymbol.resolvedReturnTypeRef.coneType.fullyExpandedType()
            .classLikeLookupTagIfAny?.toRegularClassSymbol()
            ?: return

        if (typeSymbol.modality == Modality.SEALED && !typeSymbol.isAllowedJavaNonAbstractSealedClass()) {
            reporter.reportOn(expression.source, FirErrors.SEALED_CLASS_CONSTRUCTOR_CALL)
        }
    }

    @OptIn(SymbolInternals::class)
    context(c: SessionHolder)
    private fun FirRegularClassSymbol.isAllowedJavaNonAbstractSealedClass(): Boolean {
        return fir.isJavaNonAbstractSealed == true && LanguageFeature.AllowCallingJavaOpenSealedClassConstructor.isEnabled()
    }
}
